sh/tests: Test some obscure cases with aliasing keywords

bin/sh/tests/parser/Makefile

@@ -25,6 +25,8 @@ ${PACKAGE}FILES+=	alias15.0 alias15.0.stdout
 ${PACKAGE}FILES+=	alias16.0
 ${PACKAGE}FILES+=	alias17.0
 ${PACKAGE}FILES+=	alias18.0
+${PACKAGE}FILES+=	alias19.0 alias19.0.stdout
+${PACKAGE}FILES+=	alias20.0 alias20.0.stdout
 ${PACKAGE}FILES+=	and-pipe-not.0
 ${PACKAGE}FILES+=	case1.0
 ${PACKAGE}FILES+=	case2.0

bin/sh/tests/parser/alias19.0

@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+alias begin={ end=}
+begin
+cat <<EOF
+$(echo ok)
+EOF
+end

bin/sh/tests/parser/alias19.0.stdout

@@ -0,0 +1 @@
+ok

bin/sh/tests/parser/alias20.0

@@ -0,0 +1,9 @@
+# $FreeBSD$
+
+alias begin={ end=}
+: <<EOF &&
+$(echo bad1)
+EOF
+begin
+echo ok
+end

bin/sh/tests/parser/alias20.0.stdout

@@ -0,0 +1 @@
+ok